"Glee" Season 5 spoilers are popping out here and there, even as the FOX variety show/comedy is on a long winter hiatus. An original cast reunion, more appearances from Demi Lovato and Adam Lambert, and the Nationals are among the many things fans are looking forward to seeing in new 2014 Gleek episodes.

Spoiler alert: This feature contains spoilers from the next episodes of Glee Season 5. Episode 9, "Frenemies," airs on Feb. 25.

Rachel Berry (Lea Michele) and Santana Lopez (Naya Rivera) will be the superstars of Glee 5x09. The two "frenemies" will bring their vocal A-game to show what they've got. Many fans are particularly excited to see Santana perform "Don't Rain On My Parade" from "Funny Girl." Is Santana out to show Rachel she could do a better job in the musical?

"American Idol" alum Adam Lambert reprises his role as Elliott, who is expected to be frenemies with Kurt (Chris Colfer). The two will tackle "I Believe in a Thing Called Love," from The Darkness.

Demi Lovato will be seen again as Dani in Glee Season 5, Episode 10, "Trio." Adam, Demi, and Kurt will be singing "The Happening" by The Supremes. The rumour mill is saying the X-Factor judge may not be able to do more episodes, but nothing has been officially confirmed. Dantana shippers are keeping their fingers crossed for showrunner Ryan Murphy to deliver more Dani-Santana moments.

"The girl can sing! She's got great songs, she sings her face off, she's one of those performers that I love because she gets on stage and gives everything she's got. It's really inspiring," Lambert describes Lovato to ET Canada.

The other main star on "Trio," Chris Colfer, also has the sweetest words for Demi Lovato, saying the young celebrity is "amazing."

"(Demi) has such an amazing unique voice and she's such an amazing unique person," Colfer says.

Glee Season 5, Episode 11, will reportedly be called "City of Angels." The title does bring Los Angeles to mind, and with it, the Nationals!

"Alright Nationals, bring it on. Really big few days ahead of us. Good thing I actually really enjoy doin these songs... Let's boogie!" Darren Criss took to Twitter to announce the Glee stars are already filming Glee Season 5, Episode 11. Incidentally, Criss and Colfer are nominated together at the People's Choice Awards 2014 for the Favourite Comedic TV Actor and Favourite On-Screen Chemistry. Their characters, Blaine and Kurt, are currently engaged.

Two days since Criss announced the filming of Glee 5x11, Naya Rivera gave Heather Morris a shout-out on Twitter, too.

"Unexpected Glee shoot today before the holiday break. Scenes with heather!" Naya tweeted. It is believed she was referring to Glee Season 5, Episode 12, the landmark 100th episode of the show. Brittana shippers will have a blast seeing this reunion. Also returning for this special episode are original Gleeks Dianna Agron, Amber Riley, and Mark Salling. Both Heather and Dianna were unable to join "The Quarterback," aka the Cory Monteith tribute.

With these bits of spoilers for Glee Season 5 in 2014, Gleek fans know they're in for some really special numbers.